A wheel mechanism (10) is disclosed as including an outer wheel (12), two inner wheels (36) received in the outer wheel, and two rubber dampers (24) each separating a respective outer wheel and inner wheel, the rubber dampers being deformable between a first configuration in which the entire outer periphery (37) of the inner wheel is in contact with an inner wall (29) of a recess (28) of the rubber damper and a second configuration in which a part of the outer periphery of the inner wheel is out of contact with the inner wall of the recess of the rubber damper.

A releasable wheel assembly is presented. The releasable wheel assembly includes a base plate and a bracket coupled to the base plate. The bracket includes multiple bosses and each boss includes a hole. An axle passing through the hole of each boss. The axle includes a circumferential groove adjacent to each end of the axle. Additionally, a brace is coupled to the base plate and the axle.

A transport cart (3) and a transmission device thereof (32). The transmission device comprises: a crawling assembly (320), a rotary drive assembly and a crawling drive assembly. The crawling assembly comprises: a wheel frame (321), comprising a first end and a second end opposite to the first end, the wheel frame extending from the first end to the second end; a driving wheel (322), mounted at the second end and having an axis perpendicular to the extending direction of the wheel frame; and a guide wheel (323), mounted at the second end and having an axis parallel to the extending direction of the wheel frame. The present transport cart provided with the described transmission device may move along both a horizontal rail and a vertical rail and may quickly switch between the horizontal rail and the vertical rail, thus improving the moving efficiency.

A wheel that deforms to absorb force is provided. The wheel includes one or more deformable spokes that extend from a central portion of the wheel to an outer portion of the wheel. The spokes are configured to interface against neighboring spokes after a spoke is sufficiently deformed. The neighboring spoke provides some support to the deformed spoke, thereby requiring an increased marginal force to further deform the first spoke. In one embodiment the wheel includes a plurality of pairs of spokes that are configured to interface against each other.

A wheel pad for moving an object across a surface having non-planar obstructions to allow movement of the object across the surface. The wheel pad has a contact pad and a load bearing assembly. The contact pad has an outer skin enclosing a fluid and a torus bearing. The torus bearing has a plurality of bearings, with each adjacent bearing rotatably joined by a connector that allows the bearings to independently rotate. The load bearing assembly has a load transfer mechanism and a load transfer device. The load transfer mechanism has a plurality of recirculating bearings moveably positioned inside a ball chamber. The load transfer device interacts with, but moves independently of, the load transfer mechanism to transfer the weight of the object to the contact pad, which weight is transferred to a lower surface thereof by the fluid and torus bearing to provide omnidirectional movement for the wheel pad.

A removable caster system includes a roller, a roller frame and a roller seat, the roller being positioned on the frame via a horizontal axis, the frame being inserted into the vertical shaft hole of the seat through the vertical shaft to form a detachable position; wherein a chute is installed on the upper surface with a trapezoidal stopper; a wire retainer is placed in the chute and is controlled by the movement of its narrowing section or the vertical axis to achieve removable function.

A support foot where the support foot main body is composed of a ground face, support slot and long groove. The support slot is situated on the opposite side of the grounded face and the mouth is upward-opening, and a support arm is situated above the support slot. The long groove is cut through the support arm and runs parallel to the axis of the support slot, and a rivet inserted through the long groove is used to attach the support foot to the rack. This invention consists of a support foot designed as a single unit. It is attached by a single rivet and can be folded either inward for storage or outward to form a support structure by means of the connection at the support slots.

Bicycle transport containers include a typically parallelepiped-shaped outer container. Retaining and/or receiving elements are provided inside the outer container for receiving bicycle elements such as bicycle frames, wheels and the like. In order to facilitate the transport of a bicycle transport container, the invention provides rolling elements on a bottom element of the outer container.

There is provided a spring-powered drive apparatus including a casing (102), an output shaft (103) mounted on the casing (102) in a relatively rotatable manner, a one way clutch (112) externally fitted on the output shaft (103) in the casing (102) and, a spiral spring (105, 107) housed in the casing and wound by turning of the output shaft (103) in the direction in which the one way clutch (112) transmits torque. Thus, there can be provided a compact spring-powered drive apparatus and a self-propelled caster that can be applied to a work cart or the like.

A releasable wheel assembly includes a bracket having multiple bosses, each boss including a hole that receives an axle. A pair of wheels are mounted on the axle and a pair of locking caps fit over respective ends of the axle, the locking caps each including a clip for engaging the axle at a circumferential groove to prevent movement of the locking cap along the axle. The wheel assembly can be mounted to a carry bag or other storage unit by mounting the bracket to the storage unit, where the wheels and axle can be easily removed from the bracket.